Les Bell has released (Jan 2012) his course material "Introduction to OS/2 Warp Programming" under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported license. The course had been released with its original files, OOXML, ODF, PDF version and lab exercises.

I've been waiting for this for 18 years, when I got my Highscreen Vobis Pentium 60 with OS/2 Warp included! Yuppie!

The bad part is that it wasn't pre-installed, because people didn't know what to do with OS/2 and brought the computers back to the shop. So the shop staff began to format them before selling and installed MSDOS 6 and Windows. MSDOS was not licensed, obviously...

I tried to install OS/2 by myself, but I didn't have the driver for my CD drive